Create file picker link

curl --request POST \
  --url https://api.openint.dev/v0/connect/file-picker \
  --header 'Content-Type: application/json' \
  --header 'x-apikey: <api-key>' \
  --header 'x-connection-id: <api-key>' \
  --data '{
  "customerId": "<string>",
  "validityInSeconds": 2592000,
  "theme": "light",
  "multiSelect": true,
  "folderSelect": true,
  "themeColors": {
    "accent": "<string>",
    "background": "<string>",
    "border": "<string>",
    "button": "<string>",
    "buttonLight": "<string>",
    "buttonForeground": "<string>",
    "buttonHover": "<string>",
    "buttonStroke": "<string>",
    "buttonSecondary": "<string>",
    "buttonSecondaryForeground": "<string>",
    "buttonSecondaryStroke": "<string>",
    "buttonSecondaryHover": "<string>",
    "card": "<string>",
    "cardForeground": "<string>",
    "foreground": "<string>",
    "navbar": "<string>",
    "primary": "<string>",
    "primaryForeground": "<string>",
    "secondary": "<string>",
    "secondaryForeground": "<string>",
    "sidebar": "<string>",
    "tab": "<string>"
  },
  "connectionId": "<string>"
}'

{
  "url": "<string>"
}